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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1058The Preparation, Structure and Electrical...

The Preparation, Structure and Electrical Conductivity of Ag-Doped La_1-x-ySr_xCu_yMnO_3-δ (0.05≤x≤0.4, y=0.1) Ceramics

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Abstract:

In this paper, we have presented a comprehensive study about the preparation, structure and electrical conductivity of Ag-doped La_1-x-ySr_xCu_yMnO_3-δ(0.05≤x≤0.4, y=0.1) ceramics. We first doped Ag into La_1-x-ySr_xCu_yMnO_3-δ compounds using a sol-gel method and then the gels were sintered at 1000°C by Muffle furnace. The structure variation was systematically characterized by the X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that that silver merged well into the lattice of La_1-x-ySr_xCu_yMnO_3-δ and z at.% Ag-doped La_1-x-ySr_xCu_yMnO_3-δcompounds precipitated only in one phase. As indicated by the conventional four-probe method and UV-Vis diffuse reflectance spectroscopic (DRS), the addition of Ag was dramatically effective in enhancing the electrical conductivity, whereas a slight effect of the addition of Ag on UV-Vis diffuse reflection was observed. Furthermore, the electrical conductivity increased with the enhanced sintering temperature within the temperature of 1000 °C, which proved that the dominant mechanism of the conductivity of Ag-doped ceramics was hole hopping transfer.

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Dianchi Advanced Materials Forum 2014

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Periodical:

Advanced Materials Research (Volume 1058)

Pages:

185-189

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1058.185

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Online since:

November 2014

Authors:

Yi Cao, Bao Ping Lin*, Hong Yang, Ying Sun

Keywords:

Ag-Doped La_1-x-ySr_xCu_yMnO_3-δ, Electric Conductivity, Sol-Gel Process, X-Ray Methods

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